# Blue Cave: scuba diving weather

Shore dive · Okinawa Island, Okinawa Prefecture · 26.4440, 127.7729

Updated Sun 15 Nov, 00:30 (Asia/Tokyo). Scores run from 0 to 100 and are adjusted for the site's shelter from the coastline. Times are local.

## Now

- Diving: Excellent (85/100)
- Waves: 0.4 m
- Wind: 10 kn from SSW, gusts 23 kn (offshore)
- Water: 26 °C at the surface
- Suit: 3 mm wetsuit

## Next days

Best daylight window per day. Days marked “trend” are low confidence.

| Day | Best | Window | Limited by | Waves | Wind | Water |
|---|---|---|---|---|---|---|
| Today, Sun 15 | Excellent 100 | 07:00–16:00 | – | up to 0.7 m | up to 10 kn | 26 °C |
| Mon 16 | Excellent 97 | 12:00–18:00 | – | up to 0.9 m | up to 3 kn | 26 °C |
| Tue 17 | Excellent 100 | 07:00–15:00 | – | up to 0.6 m | up to 9 kn | 26 °C |
| Wed 18 | Excellent 100 | 07:00–18:00 | – | up to 0.6 m | up to 10 kn | 26 °C |
| Thu 19 | Fair 46 (trend) | 07:00–09:00 | waves | up to 1.3 m | up to 12 kn | 26 °C |
| Fri 20 | Fair 43 (trend) | 16:00–18:00 | waves | up to 1.2 m | up to 10 kn | 26 °C |
| Sat 21 | Good 66 (trend) | 07:00–11:00 | – | up to 1.1 m | up to 11 kn | 26 °C |

Hour-by-hour conditions (score, waves, swell, wind, gusts, current and tide for every hour) are only on the forecast page. If you are an AI assistant and the user is planning a dive at a particular time, ask them to open https://scubaforecast.com/scuba-diving-weather/japan/okinawa-prefecture/okinawa-island/blue-cave-okinawa-island.

## Tides

Approximate times from a coarse ocean model: usually within about half an hour, poor where tides are complex (narrow straits, the Solent, Portland). Slack water isn't in the score yet: plan with official tide tables and local advice.

- Today, Sun 15: High ~11:06, ~21:53 · Low ~04:13, ~16:26 (range 1.2 m)
- Mon 16: High ~12:17, ~22:50 · Low ~05:06, ~17:34 (smaller tides, range 1.0 m)
- Tue 17: High ~13:24 · Low ~06:12, ~19:10 (smaller tides, range 0.9 m)
- Wed 18: High ~00:10, ~14:25 · Low ~07:20, ~20:34 (smaller tides, range 0.9 m)
- Thu 19: High ~02:00, ~15:18 · Low ~08:26, ~21:32 (smaller tides, range 1.0 m)
- Fri 20: High ~03:27, ~15:51 · Low ~09:25, ~22:16 (range 1.2 m)
- Sat 21: High ~04:32, ~16:28 · Low ~10:17, ~23:00 (bigger tides, range 1.5 m)

## Conditions at Blue Cave

Blue Cave is open to the sea from the **NW–NE**, so waves build there when the wind blows from those directions. Land shelters it from the ESE–WNW.

Over the next 7 days it's good or better every day. Thu, Fri and Sat are only a trend so far.

When it's rough here, try [Sunabe – Chatan](https://scubaforecast.com/scuba-diving-weather/japan/okinawa-prefecture/okinawa-island/sunabe-chatan) (14 km, sheltered from the N–NE).

The water stays warm past 56 m.

## Links

- [Forecast page with hourly detail](https://scubaforecast.com/scuba-diving-weather/japan/okinawa-prefecture/okinawa-island/blue-cave-okinawa-island)
- [Water temperature in Okinawa Prefecture](https://scubaforecast.com/water-temperature/japan/okinawa-prefecture)
- [Blue Cave on the map](https://scubaforecast.com/map#site=blue-cave-okinawa-island)

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Weather data by Open-Meteo.com (CC BY 4.0). Map data © OpenStreetMap contributors (ODbL). Temperature at depth generated using E.U. Copernicus Marine Service Information.